/* ===== CATALOGUE COMMON STYLES ===== */
/* Shared across all 6 product catalogue pages */

/* Language system */
[data-lang]{display:none!important}
html[lang="en"] [data-lang="en"],
html[lang="zh-hans"] [data-lang="zh-hans"],
html[lang="zh-hant"] [data-lang="zh-hant"]{display:inline!important}
html[lang="en"] [data-lang="en"].d-block,
html[lang="zh-hans"] [data-lang="zh-hans"].d-block,
html[lang="zh-hant"] [data-lang="zh-hant"].d-block{display:block!important}
html[lang="en"] [data-lang="en"].d-flex,
html[lang="zh-hans"] [data-lang="zh-hans"].d-flex,
html[lang="zh-hant"] [data-lang="zh-hant"].d-flex{display:flex!important}
html[lang="en"] [data-lang="en"].d-grid,
html[lang="zh-hans"] [data-lang="zh-hans"].d-grid,
html[lang="zh-hant"] [data-lang="zh-hant"].d-grid{display:grid!important}

/* Reset & base */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--body);color:var(--slate-800);background:var(--white);line-height:1.6;overflow-x:hidden}
img{max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent-light);color:var(--slate-800)}

/* Container */
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* Skip link */
.skip-link{position:absolute;top:-100px;left:0;z-index:1000;padding:8px 16px;background:var(--near-black);color:var(--white);font-size:0.875rem;font-weight:500;text-decoration:none;transition:top 0.2s}
.skip-link:focus{top:0;outline:2px solid var(--accent);outline-offset:2px}

/* Navigation */
nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,0.95);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--slate-200);height:60px;display:flex;align-items:center}
nav .container{display:flex;align-items:center;justify-content:space-between;width:100%}
nav .logo{font-family:var(--display);font-weight:700;font-size:1.25rem;color:var(--slate-800)}
nav .logo span{color:var(--accent)}
.lang-btn{background:none;border:none;display:inline-block!important;font-size:0.75rem;font-weight:500;color:var(--slate-400);cursor:pointer;padding:4px 8px;border-radius:6px;transition:all 0.2s;font-family:inherit;touch-action:manipulation}
.lang-btn:hover{color:var(--slate-700)}
.lang-btn.active{color:var(--white);background:var(--near-black)}
.back-btn{display:inline-flex;align-items:center;gap:6px;font-size:0.85rem;font-weight:500;color:var(--slate-600);text-decoration:none;padding:6px 16px;border-radius:999px;border:1px solid var(--slate-200);transition:all 0.2s;touch-action:manipulation}
.back-btn:hover{border-color:var(--accent);color:var(--accent-dark)}
.nav-lang{display:flex;gap:2px;padding-left:10px;border-left:1px solid var(--slate-200)}

/* Hero */
.hero{background:var(--hero-bg);color:var(--white);padding:80px 0 60px;text-align:center}
.hero h1{font-family:var(--display);font-weight:700;font-size:3.5rem;line-height:1.15;margin-bottom:16px}
.hero h1 span{color:var(--accent)}
.hero .subtitle{font-size:1.2rem;color:var(--slate-300);max-width:600px;margin:0 auto 12px}
.hero .tagline{display:inline-block;background:var(--accent-bg);color:var(--accent);padding:4px 16px;border-radius:999px;font-size:0.875rem;font-weight:500;margin-top:8px}

/* Section layout */
section{padding:60px 0}
section h2{font-family:var(--display);font-weight:600;font-size:2rem;margin-bottom:32px;position:relative;padding-bottom:12px}
section h2::after{content:'';position:absolute;bottom:0;left:0;width:60px;height:3px;background:var(--accent);border-radius:2px}

/* Mockup cards */
.mockup-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:20px;margin-bottom:40px}
.mockup-card{border-radius:var(--radius);overflow:hidden;border:1px solid var(--slate-200);background:var(--white);transition:border-color 0.3s,transform 0.2s}
.mockup-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.mockup-card img{width:100%;height:auto;display:block;aspect-ratio:4/3;object-fit:cover}
.mockup-card .caption{padding:12px 16px;font-size:0.875rem;color:var(--slate-600)}
.mockup-card .caption strong{color:var(--slate-800)}

/* Feature cards */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin-bottom:40px}
.feature-card{background:var(--slate-50);border-radius:var(--radius);padding:28px;border:1px solid var(--slate-200);touch-action:manipulation}
.feature-card .icon{font-size:2rem;margin-bottom:8px}
.feature-card h3{font-family:var(--display);font-weight:600;font-size:1.1rem;margin-bottom:8px;color:var(--slate-800)}
.feature-card p{font-size:0.9rem;color:var(--slate-600);line-height:1.7}

/* Specifications table */
.specs{width:100%;border-collapse:collapse;margin-top:24px;font-size:0.9rem}
.specs td{padding:12px 16px;border-bottom:1px solid var(--slate-200);vertical-align:top}
.specs td:first-child{font-weight:600;color:var(--slate-600);white-space:nowrap;width:180px}
.specs td:last-child{color:var(--slate-800)}

/* Design philosophy (dark) */
.philosophy{background:var(--slate-900);color:var(--white);padding:60px 0}
.philosophy h2{color:var(--white)}
.philosophy h2::after{background:var(--accent)}
.philosophy-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.phil-card{background:rgba(255,255,255,0.05);border-radius:var(--radius);padding:24px;border:1px solid rgba(255,255,255,0.08)}
.phil-card h4{color:var(--accent);font-family:var(--display);font-weight:600;font-size:1rem;margin-bottom:6px}
.phil-card p{color:var(--slate-300);font-size:0.875rem;line-height:1.6}

/* Use cases */
.use-case{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.use-case-item{background:var(--white);border-radius:var(--radius);padding:24px;border:1px solid var(--slate-200);touch-action:manipulation}
.use-case-item h3{font-family:var(--display);font-weight:600;font-size:1rem;margin-bottom:8px;color:var(--slate-800)}
.use-case-item h3 .phase{color:var(--accent);margin-right:8px}
.use-case-item p{font-size:0.88rem;color:var(--slate-600);line-height:1.7}

/* Tech stack */
.tech-stack{background:var(--slate-50);border-radius:var(--radius);padding:32px;margin-top:32px;border:1px solid var(--slate-200)}
.tech-stack h3{font-family:var(--display);font-weight:600;margin-bottom:16px;font-size:1.1rem}
.tech-stack .tag{display:inline-block;background:var(--white);border:1px solid var(--slate-200);border-radius:999px;padding:3px 14px;font-size:0.8rem;margin:3px 4px;color:var(--slate-700)}
.tech-stack .tag.highlight{border-color:var(--accent);color:var(--accent-dark);background:var(--accent-bg)}

/* Footer */
footer{background:var(--slate-900);color:var(--slate-400);text-align:center;padding:40px 0;font-size:0.85rem}
footer strong{color:var(--white)}
footer .footer-socials{display:flex;gap:20px;justify-content:center;margin:1em 0}
footer .footer-socials a{color:var(--slate-400);font-size:1.2rem;transition:color 0.2s;text-decoration:none}
footer .footer-socials a:hover{color:var(--white)}

/* Touch-action on all interactive elements */
a,.lang-btn,.back-btn,.product-card,.pillar,.mockup-card,.use-case-item,.feature-card,.tech-item,.contact-card{touch-action:manipulation}

/* Responsive */
@media(max-width:768px){
  .hero h1{font-size:2.2rem}
  .mockup-grid{grid-template-columns:1fr}
}

/* Dark mode basic protection */
@media(prefers-color-scheme:dark){
  body{background:#0f172a;color:#e2e8f0}
}

/* prefers-reduced-motion */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .mockup-card,.use-case-item,.feature-card,.phil-card{opacity:1!important;transform:none!important}
}